en.wikipedia.org/wiki/Pi

The number π is a mathematical constant. Originally defined as the ratio of a circle's circumference to its diameter, it now has various ...

www.exploratorium.edu/pi/history-of-pi

A Brief History of π Pi has been known for almost 4000 years—but even if we calculated the number of seconds in those 4000 years and calculated pi to that ...

www-groups.dcs.st-and.ac.uk/history/HistTopics/Pi_through_the_ages.html

And he made a molten sea, ten cubits from the one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did compass ...

www.math.rutgers.edu/~cherlin/History/Papers2000/wilson.html

The History of Pi. David Wilson History of Mathematics Rutgers, Spring 2000. Throughout the history of mathematics, one of the most enduring challenges has ...

www.pcworld.com/article/191389/a-brief-history-of-pi.html

Mar 13, 2013 ... In honor of Pi Day, we bring you a brief history of everyone's favorite irrational constant.

www.piday.org/learn-about-pi

History of Pi. By measuring circular objects, it has always turned out that a circle is a little more than 3 times its width around. In the Old Testament of the Bible (1 ...

www.amazon.com/History-Pi-Petr-Beckmann/dp/0312381859

Buy A History of Pi on Amazon.com ✓ FREE SHIPPING on qualified orders.